Telemotor system



Filed Jan. 1925 '3 Sheets-Sheet 1 Aug. 17,1926. 1,596,819

J. E. FARRAND TELgEMOTOR SYSTEM Filed Jan. 1925 3 Sheets-Sheet 2 STATES com, OE PHILADELPHIA, PENNSYLVANIA, A

VIA.

I 1,595,8 9- PATENT OFFICE.

JOHN E. FABRAND, 01? HOUSTON, TEXAS, ASBTGNOB TO-AIEBICAN" ENGIHEEBI NG 'rnmmoron srsrnm' Appllcaltlon mm mm 24, 1925. serm- No. 4,585.

My invention relates to telemotor systems, having particular relation to replenishing apaaratus therefor.

me obiect'of my invention is to provide a fluid telemotor system that shall he automatically maintained solid at all times.

Another object of my invention is to pro vide means, whereby the suction side of a telemotor system shall be automatically connected to a replenishing tank at every stage or the suction stroke.

A further object as my invention is to provide a .telemotor system comprising a.

casing connected to the two sides thereof,

a storage tank connected to the casing, and valves in said casing for respectively controlling the connection-between the sides of said system and said storage tank, each valve being automatically 0 erable to efiect said connection upon a dc ciency in its side of said system.

With these and other objects and applications in mind, my invention further consistsinthedetails of construction and o eration and arrangement, hereinafter descri ed and claimed and illustrated in the accompanying drawings, wherein Fig. 1 is a diagrammatic view of a tele -nictor system embodyin my invention;

. Fig. 2 is an enlarge vertical sectional view of the operating telemotor;

. Fig. 3 is an enlarged plan view of the replenishing and equalizing valve shown in Fig. 1; and

Fi 4 1s a vertical sectional view taken on the line IV-IV of Fig. 3.

A disadvantage of the telemotor systems of the prior art is in the fact that the equalization of the pressure in the different parts of the system occurs only when the steering wheel is in the mid position, and there is no provision whereby the system may be automatically replenished at every stage of the suction stroke.

figures of the drawing was developed, and, in general, comprises an. after or operated telemotor 1 of the spring centered type- This telemotor consists of cylinders 2 and 3 respectively provided with plungers 4 and 5. The latter are rigidly connected together so that when one plunger is moved into its cylinder, the other plunger is at the extreme outer limit of its stroke. The J'plungers 4 usual manner with a rudder With such desired result inv mind, the system disclosed in the several.

and 5 may be operatively associated in: the

A cross-head 6 for the ably mounted in bearings 8 and 9, said rods belng acted on by sprm s 11 which automatically tend to return t e cross-head 6 and (not shown). plungers 4 and 5 is secured to a pair of rods 7, 7 which are slid- Brannon or man'- 1 7 hence the plungers 4 and 5 to their mid po- I sition whenever they are moved therefrom.

The cylinders 2 and 3 are respectively con- '"nectedby p1pes'12 and 13 to port 0 enings 1i and 15 of cylinders 16. and 17 o aforward or operating tel'emotor 18. The cyl inders 16 and 17 are respectively provided with plungers 19 and 21 carrying racks 22 and 23 on their upper ends. A pinion 24; is so" mounted intermediate the racks 22 and 23' that a movement thereof causes, oppositemovements of the plungers 19 and 21. v The pinion 24 me be manually actuated by a steering whee 25 through gear-wheel mech-' janlsm 26, the details of which form no part of my present invention. The relative sitions of the foregoing arts are such t at when the steering whee 25 is. in the mid or central position, shown in Fig. 1, the

xoperating-andoperated telemctors 18 and- 1 are centralized and the rudder is also in the mid position.

A valve casing 27 Figs. 3 and 4) is pro vided with a longitu inally extending passage 28 terminating in port openings 29 and 31 whichv are respectively connected to 'adwhich connects both sides of the telemotor -system,-may be closed at will bymeans of a tion between the cylinders 16 and 17 of the. forward or operating telemotor 18.4 "The upper side of the valve casin 27 is provided with a threaded cylindrica rejection 36 which embraces an extension 3 of the plug valve 34. A spring 38 is disposed intermediate the extension 37 and the casing projection 36, which serves to retain the plug .jacent port openings 32 and 33 (Fig. 2) of the cyhnders L6 and 17. The passage 28, v

V valve in 4' contemplates means, w ereby the telemotor system may be automaticallyreplenished at plungers 19 and 21. To this. end, I provide a (position, the force of the spring 38 being a justed by means of a cap39 which is in threaded engagement with the casing projection 36 and which-constitutes an abutment for the upper end of the spring As above noted, in invention further every stage of the. suction. -,,stroke. of the y tank or ehamber 41 which-is. connect valve casin 27.: Communication between the sides 0 the telemotor stem and the supplyrt'ank 41 may be e ected through. va ves 44 and.45, respectivel the latter be-' in osed on o posite si es ofthe plug; valve tion and the The va ves 44'and 45ers designed as to be movable from their seats to connect the chamber 43 to the respective sides.- of the telemotor system only when a de-'- ficiency of liquid occurs or when a vacuum is formed, all as" will 'app'ean'more fully here ed vertically by stems 46 and 47 whic re inafter. The valves 44 and .45 maybe uid-' spectivel'y ex'tend into borings i48-of plugs.

" 49 and 50 disposed in threaded rforations 51 in the va ve casing.27.-.{ r and 51 further 'serve to rmitltheuremoval-i' of the valves 44 and 45 ouldthis be neces'- sary'. The a rture 35 of the. plugfv'alve34 is connected y a passa '.52'to the chamber 35 43, whereby thesupp y tank '41 may is moved to interconnect both valve passage 28.

lowered thereb be simultaneously connected to both sides 1 of the telemotor system when the plug valve 34 ends 195th? Under conditions e1 operation, when the steering wheelfQ?1 is'jmoved f'orfi its mid ition, one o t e p ungers o t e operathilg telemotor, say 21, is raised and the other causingfluid under ressure to be supp ed to the cylinder 2 o the operated or forward telemotor 1 and a withdrawal of fluid from the other cylinder 3 thereon .The resulting movement of the cross-head 6 causes the actuation of the rudder (not shown) in the usual manner.

Should, for any reason, a deficiency of" liquid occur in that ortion of the .telemotor Q I system comprisin t ecylinder' 3, the pipe 13 and'the cylin er 18 or should a vacuum arise therein due to leakage, the decrease in unseat. The su pressure on the valve 45 causes the latter to ply tank 41 is thus directly connected to thlS side of the telemotor system until the above condition has been rectified or untilthe plunger 21 has reached the end of its stroke. Attention is directed to the fact that the replenishing occurs automatically at every stage of the suction stroke and this. is

an important feature of. my invention. p 1 When the steering wheel is moved Q-in su p 16 oft e o eratin 'ed hya pipe 42 to a chamber43 formed in the .matically .f When the. operating an I "motors 18 and;"1"are"outj of coincidence, the steering wheel 25;,is moved to the mid posi plug valve 34 turned so as-to intercon'nectt a, two ends-of the valve pas- -occurat this time'in boths'jfi lugs- 49;"

fluid-in its si e of the system.

to connect said tank to the sides an opposite direction, causin the plunger 21 to move downwardly, this sideof the system now contains fluid under pressure and the valve'45 is forcibly retained in itsseat, The other side 'ofthe system comprising the cylinder 2, the pipe 12 and the cylinder 16 is now under suction dueto the u .ward movement of theplunger 19, and 1f I there should be a deficiency of fluid therein, the valve 44 automatically opens to connect the sup 1y. tank'41 directly to the cylinder telcmotor 18. Hence both sides 0 the te emotor system are autorelplenished atevery stage of the suction stro e of the plun ers'18 and 19.

operated telesage '28 and hence the sides of the telemotor y .Tho' centralizing springs 11 d s 12 of the operated telemotor 1 then function :1

to center the plungers 4 and .5. thereof. Since the aperture. east. the plug valve 34 I is also connected. by the passage 52 to the chamber 43, such deficiency of fluid as may motor system is made up.

While I have shown only one embodiment of my invention, for-the purpose of describing the same, and illustrating its principles of construction and operation, it is apparent that various 0 es and modifications may ,be made therein without departing from thespirit of invention, and I desire therefore, t at only such limitations shall im I claim:

ides 0f the 'tgle- [thereon as are indicated in the ap ended j claims or as are demanded by the pr1or arts casing connected to' both sides thereof, a

mal the connection between said tank and the sides of said system, and manually operable means mounted in said casing forconnecting the sides ofsaid system at will, each of said valves being movable automatically into an'open osition upon a deficiency of supply tank connected to said casing, nor: a y closed valves respect1vely controlling do 2. A system comprising two sets of tele f motors, means for 'operatively associating the telemotors of the two sets, a'valve casing l ply tank connected to said casing, valves in 1 connected to both sides of said system, a sup-.

said casing automatically operable to con heat the sides of said system to said tank upon a deficiency of fluid therein, and a manually operable valve in said casing for connecting the sides of said system inde-'- pendently of said first-mentioned valves,

said manually operative valve also serving.

system.

of said n v 3., In a telemotor system, the combination with a valve casing connected to both sides thereof, of a storage tank connected to said casing, a pair ofQvalves in said casing respectively connecting the sides of said system to said tank, each valve being -automatically operableupon a deficiency of fluid in its side of the system, and a third valve erable to connect said tanketo the sides of said system, whereby the formation of the vacuum in said system may be avoided, and

' a valve for connecting the sides of said ing said passage, said casing having; a

s stem and said tank independently of said nrst-mentloned valves.

5. A valve casing having a'central pas sage terminating in ports adapted to be connected, respectively, to the sides of a fluid system, a mam valve for opening and closcham her opening ,into said passage on opposite sides of said main valve, and auxiliary valves for normally closing said openings but movable into an open position when a predetermined decrease in pressure occurs at said port openings, said chamber having an additional port adapted to be connected to a supply tank, said main valve being also adapted to connect said chamber to said passage independently of said auxiliary valves.

JOHN E, ARRAND. 

